<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript</title>
    <style>
        h1{
            width:300px;            
            height: 200px;
            margin:100px auto 0;
            background-color:yellow;
            border:120px solid pink;
            line-height: 175px;
            font-size: 20px;
            text-align: center;
            color: #fff;
        }
    </style>
</head>
<body>
   <script type="text/javascript" src="./lll.js"  ></script>
</body>
</html>